22643725 has 36 divisors (see below), whose sum is σ = 32078676. Its totient is φ = 15759360.

The previous prime is 22643723. The next prime is 22643729. The reversal of 22643725 is 52734622.

It can be written as a sum of positive squares in 6 ways, for example, as 4691556 + 17952169 = 2166^2 + 4237^2 .

It is not a de Polignac number, because 22643725 - 2¹ = 22643723 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117229 + ... + 117421.

Almost surely, 2^22643725 is an apocalyptic number.

22643725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22643725 is a deficient number, since it is larger than the sum of its proper divisors (9434951).

22643725 is a wasteful number, since it uses less digits than its factorization.

22643725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 230 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 22643725 is about 4758.5423188199. The cubic root of 22643725 is about 282.9106461653.

The spelling of 22643725 in words is "twenty-two million, six hundred forty-three thousand, seven hundred twenty-five".